166040099 has 4 divisors (see below), whose sum is σ = 166107936. Its totient is φ = 165972264.

The previous prime is 166040009. The next prime is 166040111. The reversal of 166040099 is 990040661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166040099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30104 + ... + 35189.

It is an arithmetic number, because the mean of its divisors is an integer number (41526984).

Almost surely, 2^166040099 is an apocalyptic number.

166040099 is a deficient number, since it is larger than the sum of its proper divisors (67837).

166040099 is an equidigital number, since it uses as much as digits as its factorization.

166040099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67836.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 166040099 is about 12885.6547757574. The cubic root of 166040099 is about 549.6307151931.

The spelling of 166040099 in words is "one hundred sixty-six million, forty thousand, ninety-nine".